Process and apparatus for printing glass sheets



Ap 1933' c. LOCREILLE PROCESS AND APPARATUS FOR PRINTING GLASS SHEETS Fil ed March 21, 1930 C. gua d/Iv Patented Apr. 11, 1933 I a UNITED STATES PATENT OFFICE CLAUDE LOCREILLE, OF. FAUQUEZ, BELGIUM PROCESS AND APPARATUS FOR PRINTING- GLASS SHEETS Application filed March 27, 1980, Serial No. 439,516, and in Belgium March 28, 1928.

Glass sheets which are to be decorated on In the drawing the rolling train comprises one side with an embossed pattern or with as usual two pressing rolls a, b and two a more or less deep impression are usually drawing rolls 0, (5, one of which, a, is the obtained by passing under a printing roll a printing roll provided on its. surface with sheet of cast or rolled glass which then is the pattern to be impressed into theglass.

received on a table and is carried into the As shown the printing roll a is located, as annealing furnace, its decorated side facing usual, above the smooth roll at and it imupwards. By its contactwith the receiving presses the pattern into the upper side of table and the sole of the furnace the smooth the glass sheet e. However, before said sheet lower side of the sheet loses its evenness and comes to rest on the receiving table f it is the dust or even the grain of the materials turned around the roll d so that its smooth forming said table and sole form therein side comes on top and its printed side faces small marks or blemishes, while the patterns downwards. This arrangement offers the adon the upper side which is directly exposed vantage that no particular construction is 15 to the high temperature in the annealing furnecessary in order to allow of replacing the nace, are reburnt and lose their clearness. printing roll. It is only required to reverse The present invention is intended to obthe position of the rolling train with respect viate these inconveniences. According to to the entrance of the furnace and to reverse this invention, instead of feeding the glass the direction of motion of the receiving table. 7 sheet on the table and into the furnace with The guiding plate 2' may be either spaced its printed side turned upwards, I feed the away from the roll d sufficiently to allow of glass in such manner'that the printed side the sheet glass passing therebetween, or it is turned downwards and comes into contact may be in the form of a curved guide as with the receiving table and withthe furnace shown.

25 sole, the smooth side of the glass facing up- The process described is also suitable for wards. In this manner the smooth side does the production of hammered or so called not sufier from the contact with the table and cathedral glass. The roll 0 then has only the sole, and I have found that it acquires very shallow irregular depressions and proin the furnace a high degree of polish, which jections which are impressed on the side of 0 is very desirable, while the printed side slidthe glass which comes into contact with the ing on the table and the sole, is less likely to receiving table. Such contact cools the be damaged thereby owing to the fact that air printed side of the glass which contracts, thus can circulate in its depressions and cavities, accentuating the hammered effect and imthis side thus cooling more rapidly and hardparting thereto 'a natural appearance. .ening before any blemishes -or blurring of The process according to this invention the pattern might be. produced. may of course be applied to other glass arti- In carrying out my improved process the cles such as continuous strips of glass, and sheet is fed under the printing roll as usual the arrangement of the apparatus described 4 and then turned before it is received on the may be varied without departing from the 0 table so that its printed side comes to rest on scope of my invention as defined by the apthe table as in the first case. pended claims.

In carrying out this process I may use I claim: glass rolling trains of known types, with cer- 1. In a process of printing glass sheets, tain modifications which will be better un-- rolling a sheet of glass in a plastic-condition, 95 derstood with reference to the accompanyfeeding said sheet between an upper printing ing drawing in which I have illustrated by roll and a lower smooth roll, turning said way of example an embodiment of my inven-' sheet through an angle of more than 90 tion, the figure being a diagrammatic side around the smooth roll so that its impressed F view of a rolling train in which the glass is side faces downwards and receiving said 10 fed overthe printing roll. sheet on a supporting surface.

pix

2. In apparatus for printing glass sheets, the combination of a glass rolling train, an annealing furnace, a movable table, a track for said table extending from under said 5 rolling train to said annealing furnace, said glass rolling train comprising an upper pair of rolls and a lower pair of rolls, said lower paircomprising an upper printing roll and a lower smooth roll, and means for guiding a sheet of glass from said rolling train to said table through an angle of more than 90 whereby one side of the sheet will successively come into contact with said printing roll and with said table.

3. In apparatus for printing glass sheets, the combination of a glass rolling train, an annealing furnace, a movable table, a track for said table extending from under said rolling train to said annealing furnace, said glass rolling train comprising an upper pair of rolls and a lower pair of rolls, said upper pair of rolls being nearer said furnace than said lower pair of rolls, said lower pair comprising an upper printing roll and a lower smooth roll, and means for guiding a sheet of glass from under said printing roll around said smooth roll onto the table through an angle of more than 90 whereby the same side of the sheet successively comes into contact with said printing roll and with said table.

CLAUDE LOCREILLE, 

